7th Grade 1st Semester Final Review

7^th Grade-1^st Semester Final Review

Metric System

1. What tools and units would you use to measure length, mass, volume, and temperature?

Scientific Method

2. What are the major steps of the scientific method?
3. What is the difference between a qualitative and quantitative observation? Give an example.
4. What is the independent and dependent variables?
5. Why is it important to only test on thing at a time?
6. Know how to identify good and bad experiment designs and how to write a hypothesis.

Atoms

7. What are the 3 subatomic particles of an atom and where are they located?
8. What are the charges of each?
9. What is the atomic number and how can it tell you the number of protons?
10. What is the atomic mass (mass number) and how can you use it to find the number of neutrons?
11. How do you find the number of electrons?
12. Know the names and symbols of the first 18 elements.
13. Draw the Lewis dot structure and Bohr diagram for Al. Know how to do this for all elements.

Chemical Bonds

14. Using the criss-cross method determine the chemical formulas and names for:

1. Na⁺ and Cl^-
2. Mg⁺² and F^-

15.    How can you tell if a compound is ionic or covalent?

16.    Be able to draw an ionic or covalent bond using the Lewis dot structures.

17.    What is the difference between a physical change and a chemical change? Give examples of each.

18.    What are the 4 signs of a chemical reaction?

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